| | DIVER TO INSPECT SEAWAY GUARDIAN, TRIDENT AND AIR CURTAINS | HUNT UNDERWATER SPECIALTIES, LLC | $13,199 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561990All Other Support Services | Z1KAMAINTENANCE OF DAMS | May 21, 2026 | May 27, 2026 | May 28, 2026 |
| | DIVER TO INSPECT AND CLEAN SILLS AT BOTH LOCKS SO THAT STOP LOGS CAN BE INSTALLED FOR WINTER WORK. | HUNT UNDERWATER SPECIALTIES, LLC | $7,100 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561990All Other Support Services | Z1KAMAINTENANCE OF DAMS | Dec 15, 2025 | Jan 5, 2026 | Jan 31, 2026 |
| | EMERGENCY DIVE SERVICES AT EISENHOWER LOCK | HUNT UNDERWATER SPECIALTIES, LLC | $10,000 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561790Other Services to Buildings and Dwellings | Z2KAREPAIR OR ALTERATION OF DAMS | Apr 8, 2025 | Apr 8, 2025 | Apr 11, 2025 |
| | EMERGENCY DIVING SERVICES AT SNELL LOCK | HUNT UNDERWATER SPECIALTIES, LLC | $5,560 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561790Other Services to Buildings and Dwellings | Z2KAREPAIR OR ALTERATION OF DAMS | Sep 12, 2024 | Sep 12, 2024 | Sep 20, 2024 |
| | DIVING INSPECTION OF SNELL AND EISENHOWER LOCKS | HUNT UNDERWATER SPECIALTIES, LLC | $4,693 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561790Other Services to Buildings and Dwellings | Z2PZREPAIR OR ALTERATION OF OTHER NON-BUILDING FACILITIES | Nov 21, 2023 | Jan 4, 2024 | Jan 15, 2024 |
| | REPAIR OF DAMAGED SNELL LOCK AIR CURTAIN. | HUNT UNDERWATER SPECIALTIES, LLC | $4,843 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561990All Other Support Services | Z1KAMAINTENANCE OF DAMS | Nov 1, 2022 | Nov 1, 2022 | Nov 30, 2022 |
| | DIVING SERVICES TROY LOCK AND DAM | HUNT UNDERWATER SPECIALTIES, LLC | $19,336 | DEPT OF THE ARMY | DEPT OF THE ARMY | — | 561990All Other Support Services | H320INSPECTION- SHIP AND MARINE EQUIPMENT | Nov 16, 2021 | Nov 16, 2021 | Nov 30, 2026 |
| | DIVING SERVICES AT EISENHOWER LOCK | HUNT UNDERWATER SPECIALTIES, LLC | $4,658 | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | GREAT LAKES ST LAWRENCE SEAWAY DEVELOPMENT CORPORATION | — | 561990All Other Support Services | Z1KAMAINTENANCE OF DAMS | Jun 17, 2021 | Apr 20, 2021 | Apr 20, 2021 |